A sewing machine includes a spool pin stand having spool pins to which thread spools are attachable and seats corresponding to the spool pins, respectively, thread passage defining members located on a thread passage, a sewing data storage unit storing sewing data including at least thread color information about colors of the needle threads, thread supply display units which are located on the spool pin stand so as to correspond to the spool pins respectively, the thread supply display units being configured to produce light which transmits through at least ones of the spool pins and the seats and displaying the thread colors in a color-variable manner, respectively, and a thread color information control unit controlling the thread supply display units based on the thread color information so that thread colors corresponding to the spool pins are displayed by the thread supply display units, respectively.